Preseeding response to bug #305500. RAID warning msg

Hi, after preseeding succesfully Ubuntu 8.04.4 with software RAID now there’s still one bug I haven’t ironed out yet which adds an annoying manual step. After the installer finishes partitioning, it will falsely complain about not being able to reread the partition table, with this error:

“The kernel was unable to re-read the partition table on /dev/md0 (Invalid argument).
This means Linux won’t know anything about the modifications you made until you reboot.
You should reboot your computer before doing anything with /dev/md0.”

If anybody knows how to suppress this error or preseed it, please let me know.